How to save appointments in attendee's calendar in .NET

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Hi Gurus, I want to create appointments in vb.net/ c#.net and put them in to calendars of specified users. Currently I can create an appointment and save it into the outlook calendar of my local machine where the app is running. I want the appointment to be saved into the attendee's calendar. Please help. Thanks.

What I have tried:

C#

Outlook.Application outlookApp = new Outlook.Application();
            Outlook.AppointmentItem appt = (Outlook.AppointmentItem)outlookApp.CreateItem(Outlook.OlItemType.olAppointmentItem);

            appt.Subject = "Testing";
            appt.Body = "Test Appointment body";
            appt.Location = "D";
            appt.Sensitivity = Outlook.OlSensitivity.olPrivate;
            appt.Start = DateTime.Parse("04/22/2016 08:00 AM");
            appt.End = DateTime.Parse("04/25/2016 08:00 AM");
            appt.ReminderSet = true;
             appt.RequiredAttendees = "xxx@xxxxx.co.za;";
            appt.Importance = Outlook.OlImportance.olImportanceHigh;
            appt.ReminderMinutesBeforeStart = 10;
            appt.Save();

Posted 21-Apr-16 1:14am

AMADIAR

Updated 21-Apr-16 2:13am

ZurdoDev

v3

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F-ES Sitecore 21-Apr-16 7:47am

Outlook is a desktop client for your particular account settings on your machine, there is rarely any point in using automation to solve tasks unless the mail storage is local only. If you're using Exchange then you need to create the appointment in Exchange, not in Outlook, so look into Exchange Web Services. If you're not using a common Exchange then you'll have to just email the appointment and they can accept it and store it or ignore it\delete it.

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Dave Kreskowiak · Accepted Answer · 2016-04-21T02:13:00

You cannot create the appointment directly in their calendar from your code. You will NOT have access to their calendars unless they share it out to you *very unlikely) and you will NOT have impersonation permissions to put the appointments in their calendar either.

You have no choice but to create the appointment in an email and send it to them. That way they can just click on the appointment Accept button and put it in their calendar themselves.